#include<iostream>
#include<cmath>

struct polar
{
	double distance;
	double angle; 
};

struct rect
{
	double x;
	double y;
};

void rect_to_polar(const rect * pxy,polar * pda);
void show_polar (const polar * pda);

int main()
{
	using namespace std;
	rect rplace;
	polar pplace;
	cout<<"Enter the x and y values: ";
	while(cin>>rplace.x>>rplace.y)
	{
		rect_to_polar(&rplace,&pplace);
		show_polar(&pplace);
		cout<<"Next two numbers (q to quit): ";
	}
	cout<<"Done.\n";
	return 0;
}

void show_polar(const polar * pda)
{
	using namespace std;
	const double Rad_to_deg=57.29577951;
	cout<<"distance = "<<pda->distance;
	cout<<", angle = "<<pda->angle*Rad_to_deg;
	cout<<" degrees\n";
}

void rect_to_polar(const rect * pxy,polar *pda)
{
	using namespace std;
	pda->distance=sqrt(pxy->x*pxy->x+pxy->y*pxy->y);
	pda->angle=atan2(pxy->y,pxy->x);
}

